[PATCHv4 3/3] drm/imx: convey the pixelclk-active and de-active flags from DT to the ipu-di driver

["Lothar Waßmann" <LW@KARO-electronics.de>]

The 'de-active' and 'pixelclk-active' DT properties are evaluated
by of_parse_display_timing() called from  of_get_drm_display_mode(),
but later lost in the conversion from videomode.flags to
drm_display_mode.flags.
Enhance of_get_drm_display_mode() to also return the bus flags in a
separate variable, so that they can be passed on to the ipu-di
driver.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
---
 drivers/gpu/drm/drm_modes.c            |  5 ++++-
 drivers/gpu/drm/imx/imx-ldb.c          | 11 ++++++++---
 drivers/gpu/drm/imx/parallel-display.c |  8 ++++++--
 include/drm/drm_modes.h                |  2 +-
 4 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 51804e5..1570487 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -687,7 +687,8 @@ EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
  * 0 on success, a negative errno code when no of videomode node was found.
  */
 int of_get_drm_display_mode(struct device_node *np,
-			    struct drm_display_mode *dmode, int index)
+			    struct drm_display_mode *dmode, u32 *bus_flags,
+			    int index)
 {
 	struct videomode vm;
 	int ret;
@@ -697,6 +698,8 @@ int of_get_drm_display_mode(struct device_node *np,
 		return ret;
 
 	drm_display_mode_from_videomode(&vm, dmode);
+	if (bus_flags)
+		drm_bus_flags_from_videomode(&vm, bus_flags);
 
 	pr_debug("%s: got %dx%d display mode from %s\n",
 		of_node_full_name(np), vm.hactive, vm.vactive, np->name);
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index beff793..e445182 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -66,7 +66,8 @@ struct imx_ldb_channel {
 	int edid_len;
 	struct drm_display_mode mode;
 	int mode_valid;
-	int bus_format;
+	u32 bus_format;
+	u32 bus_flags;
 };
 
 struct bus_mux {
@@ -103,8 +104,10 @@ static int imx_ldb_connector_get_modes(struct drm_connector *connector)
 		struct drm_display_info *di = &connector->display_info;
 
 		num_modes = imx_ldb_ch->panel->funcs->get_modes(imx_ldb_ch->panel);
-		if (!imx_ldb_ch->bus_format && di->num_bus_formats)
+		if (!imx_ldb_ch->bus_format && di->num_bus_formats) {
 			imx_ldb_ch->bus_format = di->bus_formats[0];
+			imx_ldb_ch->bus_flags = di->bus_flags;
+		}
 		if (num_modes > 0)
 			return num_modes;
 	}
@@ -206,7 +209,8 @@ static void imx_ldb_encoder_prepare(struct drm_encoder *encoder)
 		break;
 	}
 
-	imx_drm_set_bus_format(encoder, bus_format);
+	imx_drm_set_bus_config(encoder, bus_format, 2, 3,
+			imx_ldb_ch->bus_flags);
 }
 
 static void imx_ldb_encoder_commit(struct drm_encoder *encoder)
@@ -626,6 +630,7 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
 				/* fallback to display-timings node */
 				ret = of_get_drm_display_mode(child,
 							      &channel->mode,
+							      &channel->bus_flags,
 							      OF_USE_NATIVE_MODE);
 				if (!ret)
 					channel->mode_valid = 1;
diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index 4b2ec5d..f956387 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -35,6 +35,7 @@ struct imx_parallel_display {
 	void *edid;
 	int edid_len;
 	u32 bus_format;
+	u32 bus_flags;
 	struct drm_display_mode mode;
 	struct drm_panel *panel;
 };
@@ -56,8 +57,10 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
 		struct drm_display_info *di = &connector->display_info;
 
 		num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
-		if (!imxpd->bus_format && di->num_bus_formats)
+		if (!imxpd->bus_format && di->num_bus_formats) {
 			imxpd->bus_format = di->bus_formats[0];
+			imxpd->bus_flags = di->bus_flags;
+		}
 		if (num_modes > 0)
 			return num_modes;
 	}
@@ -75,6 +78,7 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
 			return -EINVAL;
 
 		ret = of_get_drm_display_mode(np, &imxpd->mode,
+					      &imxpd->bus_flags,
 					      OF_USE_NATIVE_MODE);
 		if (ret)
 			return ret;
@@ -110,7 +114,7 @@ static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
 {
 	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
 	imx_drm_set_bus_config(encoder, imxpd->bus_format, 2, 3,
-			       imxpd->connector.display_info.bus_flags);
+			       imxpd->bus_flags);
 }
 
 static void imx_pd_encoder_commit(struct drm_encoder *encoder)
diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
index a8164d2..48e1a56 100644
--- a/include/drm/drm_modes.h
+++ b/include/drm/drm_modes.h
@@ -459,7 +459,7 @@ void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
 				   struct videomode *vm);
 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
 int of_get_drm_display_mode(struct device_node *np,
-			    struct drm_display_mode *dmode,
+			    struct drm_display_mode *dmode, u32 *bus_flags,
 			    int index);
 
 void drm_mode_set_name(struct drm_display_mode *mode);
-- 
2.1.4